Table 1 Types of uncertainty in... | Emerald Publishing

Table 1

Types of uncertainty in transport sector megaprojects

#	Type of uncertainty	Focal aspects
1	Uncertainty associated with estimates	Variability in estimates: size of parameters (i.e. time, costs, demand, benefits and quality)
1	Uncertainty associated with estimates	Basis of estimates: assumptions and production of estimates, behavioural changes and economic and social developments
2	Uncertainty about project design and logistics	Project output, the development process, construction, novelty of design and technology and technological developments
3	Uncertainty about objectives and priorities	Clarity of objectives, interdependencies and trade-offs between objectives; and new environmental targets and policies
4	Uncertainty related to fundamental relationships between project parties	Interests, roles and responsibilities of project parties

#	Type of uncertainty	Focal aspects
1	Uncertainty associated with estimates	Variability in estimates: size of parameters (i.e. time, costs, demand, benefits and quality)
1	Uncertainty associated with estimates	Basis of estimates: assumptions and production of estimates, behavioural changes and economic and social developments
2	Uncertainty about project design and logistics	Project output, the development process, construction, novelty of design and technology and technological developments
3	Uncertainty about objectives and priorities	Clarity of objectives, interdependencies and trade-offs between objectives; and new environmental targets and policies
4	Uncertainty related to fundamental relationships between project parties	Interests, roles and responsibilities of project parties

Note(s): Adapted from Ward and Chapman (2003), Atkinson et al. (2006) and Rothengatter (2019)